The Michigan Democratic Party will file a complaint with the Federal Election Commission over wether Republican U.S. Senate candidate Terri Lynn Land has coordinated with super PACs and other interest groups.

According to federal law, Super PACs can raise and spend unlimited funds to help candidates and campaigns, but cannot coordinate expenditures or strategy with campaign or staff.

"We got something on tape with a sitting Senate candidate, talking about Super PACs...that they've talked to a lot of those folks and saying that they are committed to Michigan," MDP Chair Lon Johnson told reporters Thursday afternoon in Lansing. "What happened in that conversation?"

Land spokeswoman Heather Swift said Land was referring to donors in the speech, "not representatives of a specific organization."

Swift said the attacks are "baseless" and said "Democrats are desperate to do whatever they can to deceive Michigan voters to steal the election."

"The Democrats accusations are false and offensive," Swift said in a statement. "No amount of baseless attacks will change the fact that Michigan deserves more than Washington insider Gary Peters."

The complaint comes two weeks after Americans for Prosperity issued an ad attacking U.S. Rep Gary Peters, D-Bloomfield Hills, who will likely be the Democratic nominee.

The MDP will send the complaint to the FEC on Thursday. The FEC will have to decide to investigate and, if any wrongdoing, what a penalty would be.

"Even if we take the Koch Brothers million dollar buy here off the table, we've got Secretary Land, a former Secretary of State mind you, talking about Super PACs and then in the same appearance, within minutes, saying 'our campaign has talked to those folks and they are committed to Michigan,'" Johnson said.

The question, Johnson said, is "did she request Super Pacs to come into Michigan? If so, does that constitute coordination?"